Riyue 日月
Front of the chest, in the seventh intercostal space directly below the nipple.
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Seventh rib · External abdominal oblique muscle · Rectus abdominis muscle · Internal intercostal muscles
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On this page
1Where is Riyue?
Front of the chest, in the seventh intercostal space directly below the nipple.
It is 4 B-cun from the front midline, one rib below Qimen (LR14).
In women it can be taken where the midclavicular line meets that space.
Seventh rib · External abdominal oblique muscle · Rectus abdominis muscle · Internal intercostal muscles
2How do I find it on my body?
- Across: use the nipple line, 4 B-cun from the midline (in women, the line dropped from the middle of the clavicle).
- Find Qimen in the 6th intercostal space and go down one rib.
- Press where the 7th intercostal space meets that vertical line.
A cun is a body-scaled unit of length. The precise way is to divide a bone length into equal parts (proportional bone cun); finger widths are a quick estimate.
- intercostal space
- The gap between two ribs, felt with a fingertip as a slight groove between bone and bone. It is named after the rib above it (the gap below the first rib is the first intercostal space).
- midclavicular line
- A vertical line dropped straight down from the midpoint of the collarbone, usually passing near the nipple in men. It is used instead of the nipple when locating chest points in women.
- internal intercostal muscles
- The layer of thin rib-gap muscles just inside the external intercostals. They help lower the ribs when you breathe out hard.
- external abdominal oblique
- The widest, outermost muscle on the side of the belly. Its fibers slant like hands slipped into front pockets (from upper outside to lower inside), and it twists and bends the trunk.
- midclavicular line
- A vertical line dropped straight down from the midpoint of the collarbone, usually passing near the nipple in men. It is used instead of the nipple when locating chest points in women.
- rectus abdominis
- The long vertical muscle on each side of the middle of the belly, from the pubic bone to the rib cartilages, that bends the trunk forward. It makes the 'six-pack' blocks when tightened.
3Before you press
- The pleura and lung lie close beneath the rib spaces — do not dig a fingertip in deeply.
- The liver and gallbladder lie beneath — do not press hard.
- Avoid broken or swollen skin and press only to a comfortable level.
- Acupressure is not a substitute for medical care.
- For crushing chest pain or sudden breathlessness, call emergency services at once; do not try acupressure.
4How has it been used traditionally?
- Classified as the Front-Mu point of the Gallbladder and a crossing point of the Spleen and Gallbladder meridians (Zhenjiu Jiayi Jing) — a historical classification, not a claim of effect.
- The name is usually translated as 'Sun and Moon'.
From traditional texts — not a claim of effect.
?FAQ
Where exactly is Riyue?
Front of the chest, in the seventh intercostal space directly below the nipple. It is 4 B-cun from the front midline, one rib below Qimen (LR14). In women it can be taken where the midclavicular line meets that space.
How do I find Riyue?
Across: use the nipple line, 4 B-cun from the midline (in women, the line dropped from the middle of the clavicle). Find Qimen in the 6th intercostal space and go down one rib. Press where the 7th intercostal space meets that vertical line.
What should I watch out for?
The pleura and lung lie close beneath the rib spaces — do not dig a fingertip in deeply. The liver and gallbladder lie beneath — do not press hard. Avoid broken or swollen skin and press only to a comfortable level. Acupressure is not a substitute for medical care. For crushing chest pain or sudden breathlessness, call emergency services at once; do not try acupressure.
Sources
- Location: WHO Standard Acupuncture Point Locations in the Western Pacific Region (2008), p. 183
- Standard comparison: Chinese national standard GB/T 12346-2021 (Nomenclature and location of meridian points)
- Korean anatomical terms and point names: KMCRIC Standard Acupoint DB (Korea)
- Classification source: Zhenjiu Jiayi Jing (Huangfu Mi), vol. 3
- Traditional use cross-check: AcuAtlas dataset (CC BY 4.0)
- 3D: computed on Z-Anatomy (CC BY-SA 4.0) · BodyParts3D © DBCLS
Positions computed from the WHO standard locations (2008) on Z-Anatomy (CC BY-SA 4.0) · BodyParts3D © DBCLS. For reference only — not a substitute for diagnosis or treatment. See a clinician if you are unwell.